Centrifugal pump



(No Model.)

E. J. HAWLEY.

l GENTRIFUGAL PUMP.

No. 505,790. Patented Sept. 26, 1893.

I v IWI/672307" UNITED STA-TES PATENT OFFICE.

ELI J. HAWLEY, OF MANCHESTER, VERMONT.

CENTRIFUGAL PUMP.

.SPECIE'IGATION forming part of Letters Patent No. 505,790, datedSeptember 26, 1893. Application tiled July 29,1892. Serial No. 441,560.(No model.)

To all whom it may concern:

Be it known that I, ELI J. I-IAWLEY, a citi-` zen of the United Statesof America, residing at Manchester, inthe county of Bennington and Stateof Vermont, have invented certain new and useful Improvements inCentrifugal Pumps, of which the following is a specification, referencebeing had therein to the accompanying drawings.

Myinvention relates to an improvement in centrifugal pumps of the classin which the pump is provided with a removable lining in thepiston-casing and a removable bearing in the journal, such a pump beingshown in Patent No. 367,911, granted to me August 9, 18957.` One objectof my present invention is to improve the construction of the inlet andof the side lining on the inlet side of the pump; and another object isto improve the construction of the journal and to render the bearing inthe journal capable of removal and replacement without necessitating theremoval of the linings and the piston.

The invention will firstbe described in connectionwith the accompanyingdrawings, and then pointed out in the claims.

Figure l of the drawings is a sectional elevation of myimproved pump.Fig. 2 is a sectional view of one section of `the j ournal-bearlng.

Referring to the drawings, A A' representthe casing, the letter Aindicating the capplate; B, the water-inlet; C, the piston; D, thepiston-shaft; E, the annular concave lining; F G the side lining plates;I-I, the journal, bolted to the cap-plate; I, the bearing in thejournal; J the gland, movably secured in the outer end of the journal;and K, the pipe through which water is admitted to the interior of thejournal.

I have found by experience that in the use of a pump for elevating watermixed with sand or other gritty substance there is excessive wear at theinner portion of the inlet, owing to the violent whirl there imparted tothe ingoing mixture, resulting in an early cutting away of that part ofthe inlet-pipe, after which the shot or sand is free to act withdestructive effect upon the edges of the casing.

To shield the casing from Wear in the manner stated is one purpose of mypresent invention, and this I accomplish by forming the inlet side ofthe casing with an extension L, adapting its outer end for the receptionof a suction-pipe, (not shown.) In the inner end of this extension Iform an annular recess r, of a depth suitable for the reception of thelining hereinafter mentioned, and of a length sufficient to carry thelining outward beyond the point at which the whirling action of the Huidis setup. The lining-plate G I now form with a tubular extension T,preferably integral with the plate, adapted to fit neatly and viiush inthe recess in extension L, the-inner end of this tubular portionentering the piston. Thus it will be seen that all wear at the inner endof the inlet will fall on the liningplate, and this plate, when wornbeyond the point of usefulness, can be replaced by a new one at anominal cost.

By the construction shown in my previous patent above referred to, the journal-bearing, which was tubular in form, could be removed only by irstremoving the piston from the casing. Furthermore, in that constructionthe water for washing and lubricating the bearing was admitted directlyinto a longitudinal channel, flowing thence inwardly until it reached anannular recess near the inner end of the bearing, whence it was forcedout onto the piston.

I now construct the bearing in sections, preferably halves, reducing thediameter of the inner end, so as to leave a shoulder S, adapted to bearon the outer side of the casing and thus preventinward movement of thebearing, this reduced portion extending through the casing and throughthe side-lining plate, as shown. To prevent outward movement of thesame, I form a shoulder h in the journal, against which the outer end ofthe bearing abuts. Outward beyond this shoulder h the diameter of thebore of the journal is reduced to that of the bore of the bearing; andin this reduced bore of the journal I form an annular groove l, with.which the water-supply pipe K is connected. Inward from this groovethere is a longitudinal channel 2, which opens into an annular groove 3in the outer end of the bearing, this latter groove being connected by alongitudinal channel 4 with a similar annular groove 5 in the bearing,near its inner end. t By means of these series of grooves and channels Iobtain better lubricating and cleansing effect-s from the Water thanheretofore, owing to the increased water-surface presented tothe shaft.

It will be observed on reference to the drawings that the bore of thebearing inward from groove 5 is somewhat enlarged, in order to permitthe water used in lubrication to pass inward to the face of the piston,this construction being similar to that described in my former patentabove alluded to, it being apparent that the packing P, held in placearound the shaft by the gland J,will prevent the water from passingoutward.

With the bearing constructed as above described, all that is necessaryto do in order to remove it from or place it in the pump is to unboltthe journal, slide it outward on the shaft, and lift out or put in thebearing by sections.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

l. Ina centrifugal pump having a hollow piston, the combination, with acasing having a removable cap-plate andV a recessed inletextension, ofan annular lining surrounding the periphery-of the piston, and twoliningplates, one on each side of the annular lining, one of said plateshaving an integral tubular extension, said tubular extension projectingfrom each side of the plate, its inner end reaching within the pistonand its outer end adapted to it within the recess in the inletextension,the several parts of the lining being held rigidly in place by thecap-plate.

2. In a centrifugal pump, the combination, with the casing provided witha removable lining, and a journal removably secured to the casing andhaving an interior shoulder, of a sectional bearing having an exteriorshoulder adapted to bear on the outer side of the casing, the inner endof said bearing passing through the casing and through the sideliningplate, while the outer end abuts against the shoulder in the journal.

3. In a centrifugal pump, the combination, with the casing provided witha removable lining, a journal removably secured to the casing and havingan interior shoulder, an interior annular groove, and a longitudinalchannel connecting with said groove and extending to the shoulder, and awater-supply pipe tapped into the journal to connect with the groovetherein, of a sectional bearing having an exterior shoulder adapted tobear 0n the outer side of the casing, an interior annular groove in itsouter end, a similar annular groove near its inner end,and alongitudinal channel connecting said grooves, the inner end of saidbearing passing through the casing and through the side-lining plate,while the outer end abuts against the shoulder in the journal.

In testimony whereof Iaftix my signature in presence of two witnesses.

ELI J. HA WLEY.

Witnesses:

- THOMAS MoLLoY, W. H. ROBERTS.

